Comparison of Microstructure and Mechanical Properties of friction Stir welding of Al 6082 aluminum alloy with different Tool Profiles

Thimmaraju, PavanKumar; Krishnaiah, A.; Reddy, G. Ravi Shankar; K.B.G.Tilak,

doi:10.1016/j.matpr.2016.11.092

Cited by 9 publications

(7 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, welding with the gas metal arc welding (GMAW) process can result in porosity, fractures in the HAZ and reduction in mechanical properties such as tensile strength, hardness and impact strength [63]. Welding by the FSW process had no defect formations, resulting in improved tensile strength and elongation [8,9,64]. In addition, hardness along the HAZ was improved with low heat when compared to the fusion welding process.…”

Section: Friction Stir Welding Of 6x Series Al Alloymentioning

confidence: 99%

“…For instance, P. Cavaliere et al [67] showed that increasing the number of passes on AA6082 causes the grain size to increase and the ultimate tensile strength to reduce, as well as soften (i.e., reduction in the hardness properties) the base metal. However, research showed that the hexagonal tool profile in FSW improves the tensile strength and hardness by uniformly distributing smaller grain sizes, compared to the joints formed with square and triangle tool profiles [64]. In addition to the improvements in properties achieved by changing the welding parameters, the softening effect occurred along the HAZ region of AA6082, causing fracture failure.…”

Section: Friction Stir Welding Of 6x Series Al Alloymentioning

confidence: 99%

See 1 more Smart Citation

Experimental Review on Friction Stir Welding of Aluminium Alloys with Nanoparticles

Vimalraj

Kah

2021

Metals

View full text Add to dashboard Cite

To reduce environmental impacts and ensure competitiveness, the fabrication and construction sectors focus on minimizing energy and material usage, which leads to design requirements for complex structures by joining of similar and dissimilar materials. Meeting these industrial demands requires compatible materials with improved properties such as good weight-to-strength ratios, where aluminum (Al) and its alloys are competing candidates for various complex applications. However, joining Al with fusion welding processes leads to joint deterioration. Friction stir welding (FSW) produces joints at temperatures below the melting temperature, thus avoiding flaws associated with high heat input, yet requires improvement in the resultant joint properties. Recent studies have shown that nanoparticle reinforcement in FSW joints can improve weld properties. The main focus of this study is to critically review similar and dissimilar friction stir welding of AA5083 and AA6082 with carbide and oxide nanoparticle reinforcement. The study also discusses the effect of welding parameters on reinforcement particles and the effect of nanoparticle reinforcement on weld microstructure and properties, as well as development trends using nanoparticles in FSW. Analysis shows that friction stir welding parameters have a significant influence on the dispersion of the reinforcement nanoparticles, which contributes to determining the joint properties. Moreover, the distributed nanoparticles aid in grain refinement and improve joint properties. The type, amount and size of reinforcement nanoparticles together with the welding parameters significantly influence the joint properties and microstructures in similar and dissimilar Al welds. However, research is still required to determine the strengthening mechanism used by nanoparticles and to assess other nanoparticle additions in FSW of Al alloys.

show abstract

Section: Friction Stir Welding Of 6x Series Al Alloymentioning

confidence: 99%

Section: Friction Stir Welding Of 6x Series Al Alloymentioning

confidence: 99%

Experimental Review on Friction Stir Welding of Aluminium Alloys with Nanoparticles

Vimalraj

Kah

2021

Metals

View full text Add to dashboard Cite

show abstract

“…Many recent experimental research investigations have proved that, the majority of the defects related with the joints (fabricated using traditional & conventional joining techniques) found to be eliminated completely due to the employment of FSW process, especially during joining of Al alloys [30][31][32][33][34][35][36][37][38][39][40][41]. For example, Yufeng Sun et al [31] performed an experimental investigation during joining of 6061 -T6 Al alloys using FSW process and proved that, the formation of fine grains in the stir zone have resulted in the fabrication of joints, which can withstand shear loads to a maximum of 4500 N, which is very much when compared with that of the joints fabricated using conventional welding techniques.…”

Section: Survey Of Literaturementioning

confidence: 99%

Experimental investigation on the improvement of the properties of the AZ80A Mg alloy joints using friction stir welding process

Sevvel¹,

Mahadevan²,

Sateš³

et al. 2019

FME Transactions

View full text Add to dashboard Cite

An experimental investigation was conducted with the basic objective of demonstrating the feasibility of joining the AZ80A Mg alloys using the technique of friction stir welding (FSW). Good quality joints free from defects were obtained for 5mm thickness AZ80A Mg alloy flat plates at a speed of rotation of 750 rpm with a traversing speed of 1.5 mm/min, by employing a FSW tool fabricated out of M35 grade High Speed Steel(HSS). It was experimetally observed that, the nugget zone (NZ) of the defect free weldments were found with fine sized, equally spaced & uniformly distributed grains when compared with that of the parent metal. Apart from this, the heat affected zone (HAZ) lying beside the NZ was found to possess larger sized near equaxied grains due to the effect of annealing. The weld zones were found to possess regions of slight softening nature when compared to that of the parent metal, arising from the dislocation of the lower densities. Moreover, the tensile strength of the defect free weldments was found to be around 78% of the parent metal, which seems to better than that of the strengths obtained using conventional joining techniques.

show abstract

“…However, a small advance-per-revolution is less productive and leads to excessive heat and an associated loss of strength in case of precipitation-hardened alloys. Thimmaraju et al [14] investigated the influence of triangular, square, and hexagonal pin profiles on mechanical properties and found that higher number of tool edges result in improved tensile strength. Features in shoulder and pin, shape and size of pin, and a combination of these could be advantageous to find better solutions to the welding When the work was carried out, one of the authors (AKM) was with Defence Metallurgical Research Laboratory, Hyderabad.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Tool Design on the Friction Stir Welding of Thick Aluminum Alloy AA6082-T651 Extruded Flats

Bajaj

Siddiquee

Mukhopadhyay

et al. 2020

Metallogr. Microstruct. Anal.

View full text Add to dashboard Cite

Fifteen-millimeter-thick aluminum alloy AA6082-T651 extruded flats were friction-stir-welded by using three different types of tool pin profiles, i.e., (1) conical with only left-hand threads (CL), (2) conical with both left-hand and right-hand threads (CLR), and (3) conical cam-tri-flute with left-hand threads (CTFL) up to a height of 6 mm from the pin tip. The microstructures and the mechanical properties across the weld thickness were characterized. Tunneling defect was found at the weld-bottom for the CL tool pin profile and at the weld-top for the CLR pin profile. The reasons behind the formation of such defects have been analyzed and discussed. On the other hand, a defect-free joint was obtained with the CTFL pin profile. Tensile test samples were machined from top, middle, and bottom sections of the welds, and tensile strengths were measured for all the sections to determine the joint efficiencies. Scanning electron microscopy and energy-dispersive X-ray spectroscopy were employed to identify and study the morphology of the coarse phase particles present in the base material and in different regions of the welds. These results were correlated with the microhardness contours plotted across the weld cross section.

show abstract

Comparison of Microstructure and Mechanical Properties of friction Stir welding of Al 6082 aluminum alloy with different Tool Profiles

Cited by 9 publications

References 7 publications

Experimental Review on Friction Stir Welding of Aluminium Alloys with Nanoparticles

Experimental Review on Friction Stir Welding of Aluminium Alloys with Nanoparticles

Experimental investigation on the improvement of the properties of the AZ80A Mg alloy joints using friction stir welding process

The Effect of Tool Design on the Friction Stir Welding of Thick Aluminum Alloy AA6082-T651 Extruded Flats

Contact Info

Product

Resources

About